Illuminated map.



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. T. IKBMURL ILLUMINATED MAP. APPLIOATION FILED JULY 8l 1903.

NO MODEL.

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SPECIFICATION forming part of Letters Patent No. 740,280, dated September A29, 1903.

Application Sled July 8, 1908. Serial No, 164,698. (No model.)

To all whom/t may concern: f

Beit known that I, TETSUTARO IKEMORI, a subject of the Emperor of Japan, and a resident of the city ot New York, borough of Man battan, in the county and State of New York,

may be protitablyused in a class-room toinstruct pupils in geography or history, and to so construct the map that it will consist of a body of transparent or semitransparent material, capable of being illuminated,upon the front face of which body the various countries are produced in outline only and in fixed colors-"for example, oil-colors--the subdivisions of the various countries and their names, together with the names offthe principal cities, rivers, etc., if desired, being produced upon the back of the body,` also in xed colors, the subdivisions of the several countries being exactly back of and within the out-lines of the countries to which they belong and which appear at the front of the map.

In the further construction of the map the back is given a complete coat of white in oil. Under ordinary circumstances, therefore, the back appears plain, the outlines of the countries appearing at the front of the map; but the subdivisions, .their names, and other detail informationrwill remain hidden until an electric or other light is moved over the back of the map, whereupon the hitherto-concealed,

Y unusual or noteworthy event may have occurred.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had tothe accompanying drawings, forming a part of this specication, in which similar characters of reference indicate corresponding parts in all the figures.

Figure lis a front elevation of a portion of the map. Fig. 2 is a rear elevation of a portion of the map, showing the subdivisions of a country produced thereon as they would appear upon the white background, the body of the map having been removed. Fig.A 3 is a rear elevation of a portion of the map, parts of the White back coating being broken away and a portion of the body to disclose the body and a part of the normally concealed subdivisions ot countries, the general outline ot the countries appearing at the front being shown by'dotted lines; and Fig. 4 is a vertical section through a part of the map.

A represents the body of the map, which is constructed of a material capable of being illuminated-as, for example, a transparent or a semitransparent material, such as tracing-linen, plain linen,cotton, or the like. The front face of the body A is provided with a coating 10, of oil-color, and on this front body color l0 the various countries 1l are produced in outline. These countries may be tinted within the outlines or not, as may be desired.

Next the outlines of the countries are dupli- 8o cated at the back of the body A, and in this duplication 12 the subdivisions 14 of the several countries are shown, together with the names of such subdivisions and the names of the principalcities, rivers,mountains,and the like, it desired. These subdivisions may be tinted or colored as fancy may dictate, so as to readily distinguish onefrorn the other, it

being understood that the subdivisions of each country appearing at the back of the body are immediately at the rear of the outline 'representations ot such country at the lfront and within said outline of said country.

Next, the back ot' the body A is given a coat 13 of White color.v All of the parts described, 95

IOO

the map and the countries in outline at the front; but during the progress of a lecture, for example, as the light is moved at the back of the map the subdivisions of the country, with the information thereon, Will be rendered visible at the front of the map Within the outlines of the country described.

If desired, the instructor may by the use of an opaque Water-color trace on the back of the map on the White ground color 13 a given route--leading from city to city, for example, and across oceans or seas, or rivers, or over mountains-to illustrate a line of travel, for instance. When such delineation is made and a light is placed at the back of the map, such delineation will be rendered visible at the front of the map, together with the subdivisions of the country or countries back of which such delineations are produced.

If desired, the course of travel may be indicated in Water-color on the front of the map, and various printing devices may be employed to produce the representation in Water-color of mountains, valleys, volcanoes, die., onthe front or back of the map, and after the coinpletion of the lecture all of the Water-color prints may be readily washed off, leaving the map clean and ready to be again used to demonstrate another subject.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A map, comprising a body capable of being illuminated, the front of the map having countries produced thereon in outline, and the back of the map having duplicates of the countries produced thereon, and subdivisions of the countries, for the purpose described.

2. An illuminated map, consisting of a body of transparent material or seniitransparent material, having countries in outline produced upon its front face and corresponding countries produced upon its rear face, the countries at the rear face showing subdivisions and giving other information, the back of the map being provided with a coating of White which conceals the subdivided representation of countries, whereby to make such subdivisions visible only when the rays of a light are made to pass through the mapas set forth.

3. An illuminated map, consisting of a body of transparent or semitransparent material, having its front provided with a coata ing of oil-color, and countries in outline shown on said coating, the back of the body having corresponding countries produced directly thereon, the countries at the back showa ing the subdivisions of the countries, the said body at the back being further provided with a coating of White, which White coating extends over the representations of the subdivisions of the countries, as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence o two subscribing Witnesses.

l TETSUTARO IKEMORI.v

Witnesses:

J. FRED. ACKER, JNO. M. RITTER. 

